Final answer:
The answer to the fill-in-the-blank question is 'Organs are made of different kinds of tissues work together.' Tissues are formed by cells working together, which then combine to form organs.
Step-by-step explanation:
The correct answer to the question "Blank are made of different kinds of blank work together" is a) Organs, tissues. In biology, we understand that several cells of one particular kind interconnect with each other and perform a shared function to form tissues. This is the basic level of organization. Then, various tissues combine to form an organ, such as the stomach, heart, or brain. Each organ performs one or more specific physiological functions. To understand this better, it is important to know that an organ like the heart is made up of cardiac muscle tissue, connective tissue, and nerve tissue, all which work together to pump blood through the body.